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Figure 24.7-2 is – FUJITSU F2MCTM-16LX User Manual

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CHAPTER 24 512K-BIT FLASH MEMORY

Figure 24.7-2 Example of the Flash Memory Chip Procedure

NO

1

NO

YES

YES

0

FMCS: WE (bit 5)
Flash programming enabled

Erase command sequence
(1) FFAAAA

← XXAA

(2) FF5554

← XX55

(3) FFAAAA

← XX80

(4) FFAAAA

← XXAA

(5) FF5554

← XX55

(6) FFAAAA

← XX10

FMCS: WE (bit 5)
Disable flash memory erase

Start writing

Toggle bit (DQ6)

data1(DQ6)=data2(DQ6)

Read internal address 1

Timing limit (DQ5)

Toggle bit (DQ6)

data1(DQ6)=data2(DQ6)

Completed

Erase error

: Check by hardware

sequence flag

Read internal address 2

Read internal address 1

Read internal address 2